Loans and Allowance for Credit Losses on Loans - Schedule of Loans Outstanding and Aging Analysis (Details)	3 Months Ended
	Mar. 31, 2025 USD ($) loan	Mar. 31, 2024 USD ($)	Dec. 31, 2024 USD ($) loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	$ 2,073,548,000		$ 2,083,256,000
Number of loans 90 days past due and still accruing \| loan	0		0
Financing receivable, nonaccrual, earning interest on cash basis	$ 0		$ 0
Nonaccrual interest income reversal	33,000	$ 10,000
Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	2,073,548,000		2,083,256,000
Non-accrual loans	32,921,000		33,881,000
Non-accrual loans with no allowance	4,475,000		2,993,000
Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	19,934,000		16,938,000
30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	3,185,000		2,282,000
60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	3,998,000		752,000
90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	12,751,000		13,904,000
Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	2,053,614,000		2,066,318,000
Commercial and industrial \| Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	147,291,000		152,263,000
Commercial and industrial \| Commercial and industrial \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	147,291,000		152,263,000
Non-accrual loans	2,845,000		2,845,000
Non-accrual loans with no allowance	0		0
Commercial and industrial \| Commercial and industrial \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	3,090,000		2,996,000
Commercial and industrial \| Commercial and industrial \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	245,000		203,000
Commercial and industrial \| Commercial and industrial \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		0
Commercial and industrial \| Commercial and industrial \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	2,845,000		2,793,000
Commercial and industrial \| Commercial and industrial \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	144,201,000		149,267,000
Commercial real estate loans \| Commercial owner-occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	319,112,000		321,962,000
Commercial real estate loans \| Commercial owner-occupied \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	319,112,000		321,962,000
Non-accrual loans	1,493,000		1,537,000
Non-accrual loans with no allowance	1,493,000		1,537,000
Commercial real estate loans \| Commercial owner-occupied \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	2,202,000		880,000
Commercial real estate loans \| Commercial owner-occupied \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	1,552,000		208,000
Commercial real estate loans \| Commercial owner-occupied \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	285,000		559,000
Commercial real estate loans \| Commercial owner-occupied \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	365,000		113,000
Commercial real estate loans \| Commercial owner-occupied \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	316,910,000		321,082,000
Commercial real estate loans \| Commercial non-owner occupied
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	1,292,281,000		1,273,596,000
Commercial real estate loans \| Commercial non-owner occupied \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	1,292,281,000		1,273,596,000
Non-accrual loans	26,826,000		28,525,000
Non-accrual loans with no allowance	1,225,000		497,000
Commercial real estate loans \| Commercial non-owner occupied \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	12,561,000		11,460,000
Commercial real estate loans \| Commercial non-owner occupied \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	382,000		718,000
Commercial real estate loans \| Commercial non-owner occupied \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	3,563,000		0
Commercial real estate loans \| Commercial non-owner occupied \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	8,616,000		10,742,000
Commercial real estate loans \| Commercial non-owner occupied \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	1,279,720,000		1,262,136,000
Commercial real estate loans \| Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	25,745,000		36,970,000
Commercial real estate loans \| Construction \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	25,745,000		36,970,000
Non-accrual loans	0		0
Non-accrual loans with no allowance	0		0
Commercial real estate loans \| Construction \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		0
Commercial real estate loans \| Construction \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		0
Commercial real estate loans \| Construction \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		0
Commercial real estate loans \| Construction \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		0
Commercial real estate loans \| Construction \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	25,745,000		36,970,000
Home Equity \| Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	89,240,000		88,325,000
Home Equity \| Home equity \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	89,240,000		88,325,000
Non-accrual loans	1,353,000		752,000
Non-accrual loans with no allowance	1,353,000		752,000
Home Equity \| Home equity \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	1,075,000		1,172,000
Home Equity \| Home equity \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		738,000
Home Equity \| Home equity \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	150,000		186,000
Home Equity \| Home equity \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	925,000		248,000
Home Equity \| Home equity \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	88,165,000		87,153,000
Home Equity \| Other residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	133,960,000		143,207,000
Home Equity \| Other residential \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	133,960,000		143,207,000
Non-accrual loans	206,000		0
Non-accrual loans with no allowance	206,000		0
Home Equity \| Other residential \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	802,000		0
Home Equity \| Other residential \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	802,000		0
Home Equity \| Other residential \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		0
Home Equity \| Other residential \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		0
Home Equity \| Other residential \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	133,158,000		143,207,000
Installment and other consumer loans \| Installment and other consumer loans
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	65,919,000		66,933,000
Installment and other consumer loans \| Installment and other consumer loans \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	65,919,000		66,933,000
Non-accrual loans	198,000		222,000
Non-accrual loans with no allowance	198,000		207,000
Installment and other consumer loans \| Installment and other consumer loans \| Total past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	204,000		430,000
Installment and other consumer loans \| Installment and other consumer loans \| 30-59 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	204,000		415,000
Installment and other consumer loans \| Installment and other consumer loans \| 60-89 days past due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		7,000
Installment and other consumer loans \| Installment and other consumer loans \| 90 Days or More Past Due \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	0		8,000
Installment and other consumer loans \| Installment and other consumer loans \| Current \| Financial asset, other than financial asset acquired with credit deterioration
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans, at amortized cost	$ 65,715,000		$ 66,503,000